org.apache.flink.streaming.util.serialization

接口 DeserializationSchema<T>

类型参数:

T - The type created by the deserialization schema.

所有超级接口:

org.apache.flink.api.common.serialization.DeserializationSchema<T>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<T>, Serializable

已过时。

Use DeserializationSchema instead.

@Public
 @Deprecated
public interface DeserializationSchema<T>
extends org.apache.flink.api.common.serialization.DeserializationSchema<T>, Serializable, org.apache.flink.api.java.typeutils.ResultTypeQueryable<T>

The deserialization schema describes how to turn the byte messages delivered by certain data sources (for example Apache Kafka) into data types (Java/Scala objects) that are processed by Flink.

Note: In most cases, one should start from AbstractDeserializationSchema, which takes care of producing the return type information automatically.

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.api.common.serialization.DeserializationSchema

org.apache.flink.api.common.serialization.DeserializationSchema.InitializationContext

方法概要

限定符和类型	方法和说明
T	deserialize(byte[] message) 已过时。 Deserializes the byte message.
boolean	isEndOfStream(T nextElement) 已过时。 Method to decide whether the element signals the end of the stream.

从接口继承的方法 org.apache.flink.api.common.serialization.DeserializationSchema

deserialize, open

从接口继承的方法 org.apache.flink.api.java.typeutils.ResultTypeQueryable

getProducedType

方法详细资料

deserialize

T deserialize(byte[] message)
       throws IOException

已过时。

Deserializes the byte message.

指定者:

deserialize 在接口中 org.apache.flink.api.common.serialization.DeserializationSchema<T>

参数:

message - The message, as a byte array.

返回:

The deserialized message as an object (null if the message cannot be deserialized).

抛出:

IOException

isEndOfStream

boolean isEndOfStream(T nextElement)

已过时。

Method to decide whether the element signals the end of the stream. If true is returned the element won't be emitted.

指定者:

isEndOfStream 在接口中 org.apache.flink.api.common.serialization.DeserializationSchema<T>

参数:

nextElement - The element to test for the end-of-stream signal.

返回:

True, if the element signals end of stream, false otherwise.